package flowlogic;

public class UndefValue extends Node implements SpecialValue {

	private static UndefValue instance = null;
	
	public static UndefValue getInstance()
	{
		if (instance == null) {
			instance = new UndefValue();
		}
		return instance;
	}
	
	private UndefValue()
	{
	}
	
	public String toString()
	{
		return "undef";
	}
}
